Naughty and everyone haven't seen each other for a year, and when they met again, everyone said that Naughty has grown taller. Naughty said: "The gate of my house is 2 meters high. My height used to be (1/3) the height of the gate, but now my height is (1/2) the height of the gate. How much have I grown in a year?"
淘气与大家有一年的时间没有见面了，再次见面时大家都说淘气长高了．淘气说："我家的大门高2米，原先我的身高是门高的(1/3)，现在我的身高是门高的(1/2)了．我一年长高了多少？"
<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">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 * (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>