a and b are two non-zero numbers. If (1/2) of a is equal to (1/3) of b, then a is the number of b.
a、b是两个不为零的数，若a的(1/2)等于b的(1/3)，那么a是b的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/3) / (1/2)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>