It is known that the ratio of the minuend and the subtrahend is 4:3, the minuend is 28, what is the difference.
已知被减数与减数的比是4：3，被减数是28，差是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">28 * (3/4)</gadget>
<output>21</output>

<gadget id="calculator">28 - 21</gadget>
<output>7</output>

<result>7</result>