A steel wire 60 meters long is used to form a cuboid frame with a length of 7 meters, a width of 5 meters, and a height of cm.
用一条长60米的钢丝围成一个长方体框架，长是7米，宽是5米，高是多少厘米．
<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<result>300</result>