The perimeter of the cross section of a certain type of water pipe is 157 cm, what is the radius of this water pipe in cm? (π takes 3.14)
某型水管的横截面的周长是157cm，那么这种水管的半径是多少cm．(π取3.14)
<gadget id="calculator">157 / 3.14 / 2</gadget>
<output>25</output>

<result>25</result>