In a subtraction formula, the sum of the minuend, the subtrahend and the difference is equal to (9/4), and the minuend must be equal to something.
在一个减法算式中，被减数、减数与差的和等于(9/4)，被减数一定等于多少．
<gadget id="calculator">9 / 4</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">(9/4) / 2</gadget>
<output>9/8 = around 1.125</output>

<result>9/8 = around 1.125</result>