Calchy.
Conversion - Celsius to Fahrenheit

What is 21°C in Fahrenheit?

Answer
69.8
°F
21 × 9/5 + 32 = 69.8 °F
How we got there
  1. 01Multiply by 9/5 (= 1.8): 21 × 1.8 = 37.8
  2. 02Add 32: 37.8 + 32 = 69.8 °F
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