The outer diameter of a wheel of a white carriage is 7.4 decimeters. If it wants to pass a 1570-meter-long bridge, how many turns does the wheel need to turn from the bridge to the bridge? (Retain integers.)
一辆白行车车轮的外直径是7.4分米，如果要通过一座1570米长的大桥，那么这个车轮从上桥到离桥要转动多少圈？(得数保留整数．)
<result>676</result>