A coal mining team plans to mine 40.5 tons of coal per month, but the actual monthly production exceeds 4.5 tons. The task originally planned to be completed in 10 months can actually be completed in how many months?
一个采煤小组计划每月采煤40.5吨，实际每月超产4.5吨，原计划10个月完成的任务，实际几个月可以完成？
<gadget id="calculator">40.5 + 4.5</gadget>
<output>45</output>

<gadget id="calculator">10 / 45</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">40.5 * (2/9)</gadget>
<output>9</output>

<result>9</result>