Xiao Ming pours 500ml of fruit juice into a small cup and a large cup, which are just full. The capacity of the small cup is (1/4) of the large cup. What is the capacity of the small cup in milliliters?
小明把500毫升果汁倒入1个小杯和1个大杯，正好倒满．小杯的容量是大杯的(1/4)．小杯的容量是多少毫升？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">500 / (5/4)</gadget>
<output>400</output>

<gadget id="calculator">400 * (1/4)</gadget>
<output>100</output>

<result>100</result>