The quotient of subtracting 12 from a number divided by 60 is 4. What is this number?
一个数减去12所得的差除60商是4．这个数是多少．
<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">15 + 12</gadget>
<output>27</output>

<result>27</result>