15 8s are 10 more than 4 times a number, find this number. (column equation solution)
15个8比一个数的4倍多10，求这个数．(列方程解答)
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">120 - 10</gadget>
<output>110</output>

<gadget id="calculator">110 / 4</gadget>
<output>55/2 = around 27.5</output>

<result>55/2 = around 27.5</result>