Uncle Zhang mowed a lawn of 243 square meters in 4.5 hours. How long will it take to mow another lawn of 135 square meters?
小张叔叔4.5小时修剪了243平方米的草坪，如果再修剪135平方米的草坪，还需多长时间能完成？
<gadget id="calculator">243 / 4.5</gadget>
<output>54</output>

<gadget id="calculator">135 / 54</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>