If 3x+7=37, then 5x-8=how much.
如果3x+7=37，那么5x-8=多少．
<gadget id="calculator">37 - 7</gadget>
<output>30</output>

<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">50 - 8</gadget>
<output>42</output>

<result>42</result>