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---
id: 69162d64f96574d9bb629efe
title: "Challenge 113: Miles to Kilometers"
challengeType: 28
dashedName: challenge-113
---
# --description--
Given a distance in miles as a number, return the equivalent distance in kilometers.
- The input will always be a non-negative number.
- 1 mile equals 1.60934 kilometers.
- Round the result to two decimal places.
- Remove unnecessary trailing zeros from the rounded result.
# --hints--
`convertToKm(1)` should return `1.61`.
```js
assert.equal(convertToKm(1), 1.61);
```
`convertToKm(21)` should return `33.8`.
```js
assert.equal(convertToKm(21), 33.8);
```
`convertToKm(3.5)` should return `5.63`.
```js
assert.equal(convertToKm(3.5), 5.63);
```
`convertToKm(0)` should return `0`.
```js
assert.equal(convertToKm(0), 0);
```
`convertToKm(0.621371)` should return `1`.
```js
assert.equal(convertToKm(0.621371), 1);
```
# --seed--
## --seed-contents--
```js
function convertToKm(miles) {
return miles;
}
```
# --solutions--
```js
function convertToKm(miles) {
const km = miles * 1.60934;
return Math.round(km * 100) / 100;
}
```