What is the number 42 less than 80 (7/10).
比80的(7/10)少42的数是多少．
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">80 * (7/10)</gadget>
<output>56</output>

<gadget id="calculator">56 - 42</gadget>
<output>14</output>

<result>14</result>