Because 63*78=4914, so 630*7.8=how much
因为63*78=4914，所以630*7.8=多少
<gadget id="calculator">63 * 10</gadget>
<output>630</output>

<gadget id="calculator">78 / 10</gadget>
<output>39/5 = around 7.8</output>

<gadget id="calculator">630 * (39/5)</gadget>
<output>4_914</output>

<result>4_914</result>