row of telephone poles, the original distance between each two is 30 meters, now changed to 45 meters. If a telegraph pole at the starting point does not move, there will be another telegraph pole at least how many meters away.
一排电线杆，原来每两根之间的距离是30米，现在改为45米．如果起点的一根电线杆不移动，至少再隔多少米又有一根电线杆不需要移动．
<gadget id="calculator">2 * 3 * 3 * 5</gadget>
<output>90</output>

<result>90</result>