A liberation army rushed from the camp to the earthquake-stricken area to deliver first-aid supplies. If the travel speed was increased (1/9) than the original plan, it could arrive 20 minutes earlier than the scheduled time; 1/3), you can arrive 30 minutes earlier than the scheduled time. Find the distance from the army camp to the earthquake-stricken area.
某解放部队从营地赶往地震灾区运送急救物资，如果行进速度比原计划提高(1/9)，就可以比预定时间早到20分钟；如果按原速行驶72千米，再将速度提高(1/3)，就可以比预定时间早到30分．求部队营地到地震灾区的距离．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">1 / (4/3)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">200 * (1/4)</gadget>
<output>50</output>

<gadget id="calculator">30 / 50</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">72 / (2/5)</gadget>
<output>180</output>

<result>180</result>