Add 6 to 4 times a number, then subtract 10, and finally multiply by 2, the result is 80. What is this number?
一个数的4倍加上6，再减去10，最后乘以2，结果得80．这个数是多少．
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">40 + 4</gadget>
<output>44</output>

<gadget id="calculator">44 / 4</gadget>
<output>11</output>

<result>11</result>