It takes (1/4) sheet of paper to cut a flower. Xiao Ming cut 9 flowers, and Xiao Hong cut 11 flowers. How many sheets of paper did they use?
剪一朵花要用(1/4)张纸，小明剪了9朵花，小红剪了11朵花，它们一共用了多少张纸？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">9 + 11</gadget>
<output>20</output>

<gadget id="calculator">(1/4) * 20</gadget>
<output>5</output>

<result>5</result>