The pea shooter fires a shell every 4 seconds, the speed of the shell is 9 m/s, and the speed of the zombie is 3 m/s. Question: When a zombie appears within the shooting range of the pea shooter, the shooter will launch a cannon attack. It is known that ten shells can destroy a zombie, so how many meters can the shooting range be greater than to ensure that the pea shooter is not attacked?
豌豆射手每4秒钟发出一发炮弹，炮弹速度为9米/秒，僵尸的速度为3米/秒．问：当僵尸出现在豌豆射手的射程之内时，射手就会发炮攻击．已知十发炮弹可以消灭一个僵尸，那么射程大于多少米，就可以保证豌豆射手不受攻击？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<gadget id="calculator">36 * 3</gadget>
<output>108</output>

<result>108</result>