My mother said: "Add 16 to my age, then divide by 4, then subtract 5 and multiply by 11, which happens to be 99 years old." How old is my mother?
妈妈说："把我的年龄加上16，然后除以4，再减去5后乘11，恰好是99岁．"妈妈今年多少岁？
<gadget id="calculator">99 / 11</gadget>
<output>9</output>

<gadget id="calculator">9 + 5</gadget>
<output>14</output>

<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<gadget id="calculator">56 - 16</gadget>
<output>40</output>

<result>40</result>