iview 栅格一行分五个，可用于不是24的公因数

<Row :gutter="20">
    <Col style="float: left; 20%;">
        <div  style="border: 1px solid;">
            1111
        </div>
    </Col>
    <Col style="float: left; 20%;">
        <div  style="border: 1px solid;">
            1111
        </div>
    </Col>
    <Col style="float: left; 20%;">
        <div  style="border: 1px solid;">
            1111
        </div>
    </Col>
    <Col style="float: left; 20%;">
        <div  style="border: 1px solid;">
            1111
        </div>
    </Col>
    <Col style="float: left; 20%;">
        <div  style="border: 1px solid;">
            1111
        </div>
    </Col>
</Row>