It is known that B's weight is 30kg, and A is 25% heavier than B, what is A's weight in kg?
已知乙的体重是30kg，甲比乙重25%，甲的体重是多少kg．
<gadget id="calculator">25 / 100</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">30 * (5/4)</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>