Add 6 to a number, divide by 5, subtract 4, multiply by 10 to get 40. What is this number?
一个数加上6，除以5，再减去4后，乘以10得40．这个数是多少．
<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">4 + 4</gadget>
<output>8</output>

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

<gadget id="calculator">40 - 6</gadget>
<output>34</output>

<result>34</result>