7 times a number minus 2 is 5 times 8, what is this number?
一个数的7倍减2是8的5倍，这个数是多少？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">40 + 2</gadget>
<output>42</output>

<gadget id="calculator">42 / 7</gadget>
<output>6</output>

<result>6</result>