A cylindrical water pipe with a bottom radius of 4cm and a length of 1.2m. How many such water pipes can be made by using a rectangular iron sheet with a length of 6.28m and a width of 2.4m? (neglected at joints)
一种圆柱形水管，底面半径是4cm，长1.2m，用一块长6.28m、宽2.4m的长方形铁皮做这样的水管，可以做多少根？(接头处忽略不计)
<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">100 / 25.12</gadget>
<output>3.980892</output>

<gadget id="calculator">2.4 / 1.2</gadget>
<output>2</output>

<gadget id="calculator">6.28 * 3.980892 * 2</gadget>
<output>50.000004</output>

<result>50.000004</result>