Two engineering teams excavate a 1840m tunnel at the same time, each working from one end to the other, and it takes 20 days to get through. Team B excavates 38m per day. How many meters does team A excavate per day?
两个工程队同时开凿一条1840m的隧道，各从一端相向施工，20天打通，乙队每天开凿38m，甲队每天开凿多少米？
<gadget id="calculator">1_840 / 20</gadget>
<output>92</output>

<gadget id="calculator">92 - 38</gadget>
<output>54</output>

<result>54</result>