What number minus 3.5 and multiplied by 8, the result is 56.
什么数减去3.5后乘8，结果是56．
<gadget id="calculator">56 / 8</gadget>
<output>7</output>

<gadget id="calculator">7 + 3.5</gadget>
<output>10.5</output>

<result>10.5</result>