2 1 km = ? mm 1 m = ? mm
1 km = 1000000 mm 1 m = 1000 mm
样例2输入 5 100 m = ? mm 1000 km = ? m 20 kg = ? g 200 g = ? mg 0 kg = ? mg 样例2输出 100 m = 100000 mm 1000 km = 1000000 m 20 kg = 20000 g 200 g = 200000 mg 0 kg = 0 mg
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