There are two piles of coal. Originally, pile A is 1.5 tons more than pile B. Now 4.5 tons are transported from pile A. At this time, pile A is exactly the same as pile B (2/3). How many tons of coal does B pile have?
有两堆煤，原来甲堆比乙堆多1.5吨，现在从甲堆运走4.5吨，这时甲堆煤正好是乙堆的(2/3)．乙堆煤有多少吨？
<gadget id="calculator">4.5 - 1.5</gadget>
<output>3</output>

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

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

<gadget id="calculator">3 / (1/3)</gadget>
<output>9</output>

<result>9</result>