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Peter has a rope, and he ties some knots, each using $10$-cm rope. He ties $25$ knots in total. After he ties the last knot, the knots divide the rope into pieces~ equally, and the length of each piece is $7$ cm. What is the length of the entire rope? 
Overseas Competition->Knowledge Point->Word Problem Modules->Interval Problems
$25\times10+(25+1)\times7=432$ 