---
id: 5d792533bb38fab70b27f527
title: Part 16
challengeType: 0
dashedName: part-16
---
# --description--
`arg1` and `arg2` are the numbers input by the user in a string such as "1+3".
Pass `parseFloat(arg1)` and `parseFloat(arg2)` as the arguments to `infixToFunction[fn]` (remember `infixToFunction[fn]` is a function).
# --hints--
See description above for instructions.
```js
const regex = /([0-9.]+)([+-\/*])([0-9.]+)/;
assert(
infixEval('23+35', regex) === '58' &&
infixEval('100-20', regex) === '80' &&
infixEval('10*10', regex) === '100' &&
infixEval('120/6', regex) === '20'
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```