3b complete

3/index3a.js

@@ -0,0 +1,17 @@
+const fs = require("fs")
+const regEx = /mul\(\d+,\d+\)/g
+let total = 0
+const input = fs.readFileSync("input.txt","utf-8")
+const result = input.match(regEx)
+// console.log("hello world")
+console.log(result)
+result.forEach((mulString)=>{
+    const numRegex= /\d+/g
+    const numbers = mulString.match(numRegex)
+    console.log(...numbers)
+    const aVal =parseInt(numbers[0])
+    const bVal=parseInt(numbers[1])
+    total += aVal*bVal
+})
+
+console.log("total: ",total)