A grandfather said: "Add 12 to my age, divide by 4, then subtract 12, and multiply by 10. It is exactly 100 years old." How old is this old man now?
一位老爷爷说："把我的年龄加上12，再除以4，然后减去12，再乘10．恰好是100岁．"这位老爷爷现在多少岁？
<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<gadget id="calculator">10 + 12</gadget>
<output>22</output>

<gadget id="calculator">22 * 4</gadget>
<output>88</output>

<gadget id="calculator">88 - 12</gadget>
<output>76</output>

<result>76</result>