Add 8 to a number, divide it by 8, and subtract 2. After multiplying by 10 times, it is 30. What is this number?
一个数加上8，再除以8，再减去2后，扩大10倍是30，这个数是多少？
<gadget id="calculator">30 / 10</gadget>
<output>3</output>

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

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">40 - 8</gadget>
<output>32</output>

<result>32</result>