During the summer vacation, Xiaodong went from home to the Children's Palace to learn piano every day. If you walk 50 meters per minute, you will be late for 6 minutes; if you walk 30 meters per minute, you will be 3 minutes early; you can calculate how many meters away Xiaodong's home is from the Children's Palace.
暑假，小冬每天从家到少年宫学钢琴．如果每分钟走50米，则会迟到6分钟；如果每分钟多走30米，则会早到3分钟；可以算出，小冬的家距少年宫有多少米．
<gadget id="calculator">50 * 6</gadget>
<output>300</output>

<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">300 + 240</gadget>
<output>540</output>

<gadget id="calculator">540 / 30</gadget>
<output>18</output>

<gadget id="calculator">18 + 6</gadget>
<output>24</output>

<gadget id="calculator">50 * 24</gadget>
<output>1_200</output>

<result>1_200</result>