100÷(100÷99)÷(99÷98)÷(98÷97)÷……÷(3÷2)÷(2÷1)÷1=100÷100×99÷99×98÷98×97÷……÷3×2÷2×1÷1=1
100x99/100x99/98X98/97x......x3/2x2/1=