From home to school, if Xiao Ming walks 60 meters per minute, he is 5 minutes early; if he walks 45 meters per minute, he is 10 minutes late. Now Xiao Ming wants to arrive at school on time, how many meters must he walk per minute?
小明从家到学校，若每分钟行60米，刚早到5分钟；若每分钟行45米，则迟到10分钟．现在小明要准时到校，每分钟必须行多少米？
<gadget id="calculator">60 * 5</gadget>
<output>300</output>

<gadget id="calculator">45 * 10</gadget>
<output>450</output>

<gadget id="calculator">300 + 450</gadget>
<output>750</output>

<gadget id="calculator">60 - 45</gadget>
<output>15</output>

<gadget id="calculator">750 / 15</gadget>
<output>50</output>

<gadget id="calculator">50 - 5</gadget>
<output>45</output>

<gadget id="calculator">60 * 45</gadget>
<output>2_700</output>

<gadget id="calculator">2_700 / 50</gadget>
<output>54</output>

<result>54</result>