A is B's (1/2), B is C's (1/3), A is C's much.
甲是乙的(1/2)，乙是丙的(1/3)，甲是丙的多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / (1/3)</gadget>
<output>3</output>

<gadget id="calculator">(1/2) / 3</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 * (1/6)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>