Hongmin Township wanted to dig a canal. It was planned to dig 120 meters per day, and the task could be completed in 18 days. In fact, the task was completed in only 12 days. How much more meters was dug per day than planned?
洪民乡要挖一条水渠，计划每天挖120米，18天可以完成任务，实际只用12天就完成了任务，实际比计划每天多挖多少米？
<gadget id="calculator">18 / 12</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">120 * (3/2)</gadget>
<output>180</output>

<gadget id="calculator">180 - 120</gadget>
<output>60</output>

<result>60</result>