If 4x-5=35, then 5x-4=how much.
如果4x-5=35，那么5x-4=多少．
<gadget id="calculator">5 + 35</gadget>
<output>40</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

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

<gadget id="calculator">50 - 4</gadget>
<output>46</output>

<result>46</result>