In a division formula, the sum of the dividend and the divisor is 5, and the known quotient is (1/4), what is the division formula.
在一道除法算式中，被除数、除数的和是5，已知商是(1/4)，这道除法算式是多少．
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">5 / 5</gadget>
<output>1</output>

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<gadget id="calculator">5 / 5 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>