If A/B=2, B/C=3, C/D=4, D/E=(1/2), E/F=(1/3), then how much is A/F=.
如果A/B=2，B/C=3，C/D=4，D/E=(1/2)，E/F=(1/3)，那么A/F=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">2 * 3 * 4 * (1/2) * (1/3)</gadget>
<output>4</output>

<result>4</result>