Now there are 100 deer coming to the city, and each family in the city will divide one deer, and there will be an endless number of remaining deer; if the remaining deer are divided into three families, one deer will be distributed exactly. So how many families are there in the city?
现在有100只鹿要进城，城里的人家每家分1只，会有剩余的鹿分不完；如果再将剩余的鹿，3家分1只，恰好分完．那么城里共有多少户人家．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">100 / (4/3)</gadget>
<output>75</output>

<result>75</result>