diff --git a/areaCalculator.js b/areaCalculator.js
new file mode 100644
index 0000000..39c8683
--- /dev/null
+++ b/areaCalculator.js
@@ -0,0 +1,55 @@
+const cal = require("./cal");
+const funcArr = [];
+const areaArr = [];
+
+const getArea = function(shape, ...rest) {  
+    let result = 0;
+    if (shape === "circle") {
+        if (rest.length === 1) {
+            result = cal.getCircleArea(rest[0]);
+        } else if (rest.length === 2) {
+            result = cal.getCircleSum(rest[0], rest[1]);
+        }
+    } else if (shape === "rect") {
+        result = cal.getSquareArea(rest[0], rest[1]);    
+    } else if (shape === "trapezoid") {
+        result = cal.getTrapezoidArea(rest[0], rest[1], rest[2]);
+    } else if (shape === "cylinder") {
+        result = cal.getCircleArea(rest[0], rest[1]);
+    } else {
+        result = "잘못 입력하셨습니다";
+    }
+
+    if (result !== "잘못 입력하셨습니다") {
+        funcArr.push(shape);
+        areaArr.push(result);
+    }
+    return result;
+}
+
+const printExecutionSequence = function() {
+    let result1 = "계산수행순서 : ";
+    for (shape of funcArr) {
+        result1 = result1 + shape + ", ";
+    }
+    console.log(result1);
+    console.log();
+
+    let result2 = "";
+    for (let i = 0; i < funcArr.length; i++) {
+        console.log(funcArr[i] + " : " + areaArr[i]);
+    }
+}
+
+function main() {
+    getArea('circle', 2); 
+    getArea('circle', 1, 3);
+    getArea('rect', 2, 3);
+    getArea('trapezoid', 5, 8, 10);
+    getArea('cylinder', 5, 10);
+    getArea('triple', 4, 3);
+
+    printExecutionSequence();
+}
+
+main();
diff --git a/cal.js b/cal.js
new file mode 100644
index 0000000..c8170ab
--- /dev/null
+++ b/cal.js
@@ -0,0 +1,51 @@
+const getCircleArea = radius => {
+    checkError(radius);
+    return Math.PI * radius * radius;
+}
+
+const getSquareArea = (width, height) => {
+    checkError(width, height);
+    return width * height;
+}
+
+const getTrapezoidArea = (top, bottom, height) => {
+    checkError(top, bottom, height);
+    return ((top + bottom) * height) / 2
+}
+
+const getCylinderArea = (radius, height) => {
+    checkError(radius, height);
+    return getCircleArea(radius) * height;
+}
+
+const getCircleSum = (num1, num2) => {
+    let start, end;
+    if (num1 >= num2) {
+        start = num2;
+        end = num1;
+    } else {
+        start = num1;
+        end = num2;
+    }
+
+    if (start === end) {
+        return Math.PI * end * end;
+    } else {
+        return Math.PI * end * end + getCircleSum(start, end - 1);
+    }
+}
+
+const checkError = function(...args) {
+    for (let val of args) {
+        if (typeof val === "undefined") {
+            throw new Error("인자의 갯수가 부족합니다.");
+        }
+        if (typeof val !== "number") {
+            throw new Error("인자값이 숫자가 아닙니다.");
+        }
+    }
+}
+
+module.exports = {getCircleArea, getSquareArea, 
+    getTrapezoidArea, getCylinderArea, getCircleSum};
+    
\ No newline at end of file