21cm is about 8.27 inches.
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21 centimeters is 8.3 inches
21 centimeters x 1 inch/2.54 centimeters = 8.267716535 inchesThere are 8.267716535 inches in 21 centimeters.
420 centimeters = 165.354331 inches
1.8 centimeters = 0.708661417 inches
2.54 centimeters = 1 inch4.3 centimeters = 1.693 inches (rounded)