The quotient of the number A divided by the number B is (1/3), then A accounts for their sum ((())/(())).
数A除以数B的商是(1/3)，那么，A就占它们和的((())/(()))．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<result>1/4 = around 0.25</result>