It takes 20 minutes for John to go to the bathroom 8 times.  How long would it take to go 6 times?
He spends 20/8=
<gadget id="calculator">20/8</gadget>
<output>5/2 = around 2.5</output>
2.5 minutes each time he goes in.
So it would take 2.5*6=
<gadget id="calculator">2.5*6</gadget>
<output>15</output>
15 minutes to go 6 times.

<result>15</result>