Two barrels of oil, A and B, are of the same weight. Pour 1/3 of the contents of A into B. At this time, the weight of B’s oil is how many times that of A’s.
甲、乙两桶油同样重，把甲桶的(1/3)倒入乙桶，这时乙桶油的重量是甲桶油的多少倍
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

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

<gadget id="calculator">(4/3) / (2/3)</gadget>
<output>2</output>

<result>2</result>