The sum of adding 3 to a number and multiplying by 8, the result is 40, what is this number
一个数加上3的和乘8，结果是40，这个数是多少
<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<result>2</result>