The sum of the sides of a cuboid is 28 centimeters, and the ratio of length, width and height is 4:2:1, what is the length in centimeters? how many centimeters
一个长方体棱长和是28厘米，长宽高的比是4：2：1，长是多少厘米？多少厘米
<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<gadget id="calculator">4 + 2 + 1</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">7 * (4/7)</gadget>
<output>4</output>

<result>4</result>