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---
id: 5900f3c11000cf542c50fed4
title: 问题85：计算矩形
challengeType: 5
videoUrl: ''
# --description--
通过仔细计数可以看出，3×2的矩形网格包含十八个矩形：
虽然不存在包含正好两百万个矩形的矩形网格，但是找到最近解的网格区域。
# --hints--
`euler85()`应该返回2772。
```js
assert.strictEqual(euler85(), 2772);
```
# --solutions--