A and B each have 10 sheets of paper, how many sheets of paper A can give B to make B have 50% more paper than A.
甲、乙两人每人都有10张纸，甲给乙多少张纸可以使乙的纸张数比甲多50%．
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 * (2/5)</gadget>
<output>8</output>

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<result>2</result>