Teacher Fang cut a cylindrical wooden stick with a length of 1.2m and a circumference of 9.42cm at the bottom into 4 sections of equal length to make a baton. By how many square centimeters does the surface area of the 4 batons increase from the surface area of the original wooden sticks?
方老师把一根长1.2m，底面周长是9.42cm的圆柱形木棒截成等长的4段，做成接力棒．4根接力棒的表面积比原来木棒的表面积增加了多少平方厘米？
<gadget id="calculator">9.42 / 3.14 / 2</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">3.14 * 2.25 * 6</gadget>
<output>42.39</output>

<result>42.39</result>