The ratio of basketballs between schools A and B is 2:1. If school A gives 4 basketballs to school B, the ratio of basketballs between schools A and B is 4:3. How many basketballs did the original school have?
甲、乙两校原有篮球只数的比是2：1，如果甲校给乙校4只，甲、乙两校篮球只数的比是4：3．原有甲校有篮球多少只？
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(4/3) * 4</gadget>
<output>16/3 = around 5.333333</output>

<gadget id="calculator">4 + (16/3)</gadget>
<output>28/3 = around 9.333333</output>

<gadget id="calculator">2 - (4/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(28/3) / (2/3)</gadget>
<output>14</output>

<gadget id="calculator">14 * 2</gadget>
<output>28</output>

<result>28</result>