Xiaopang's father went from home to the supermarket and rode a bicycle for 3 kilometers in 15 minutes. According to this calculation, what is his speed?
小胖的爸爸从家到超市去，骑自行车15分钟行了3千米，照这样计算，他的速度是多少．
<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>