The daughter said: "Mom, when I grow up to your age, you will be 73 years old." The mother said: "When I was as old as you, you were only 1 year old." How old is my mother now.
女儿说："妈妈，我长到你现在这么大年龄时，你就73岁啦．"妈妈说："我象你这么大年龄时，你只有1岁．"妈妈现在多少岁．
<gadget id="calculator">73 + 1 + 73</gadget>
<output>147</output>

<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

<gadget id="calculator">147 / 3</gadget>
<output>49</output>

<result>49</result>