There are 30 white rabbits in the breeding group, 4 more than black rabbits (1/4). How many black rabbits are there?
饲养小组有白兔30只，比黑兔的(1/4)多4只，黑兔有多少只？
<gadget id="calculator">30 - 4</gadget>
<output>26</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">26 / (1/4)</gadget>
<output>104</output>

<result>104</result>