Now there are 100 deer in the city, if each family divides one deer, it will not be finished; let every 3 families share one remaining deer, just finish the division. Ask how many families there are in the city.
现有100只鹿进城，如果每家分1只鹿，分不完；又让每3家分一只剩余的鹿，刚好分完．问城中共有多少户人家．
<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>