my country has a vast territory, with a distance of 4800km from east to west, and the distance from east to west is north to south (48/55). How many kilometers is the distance between north and south?
我国幅员辽阔，东西相距4800km，东西距离是南北的(48/55)．南北相距多少千米？
<gadget id="calculator">48 / 55</gadget>
<output>48/55 = around 0.872727</output>

<gadget id="calculator">4_800 / (48/55)</gadget>
<output>5_500</output>

<result>5_500</result>