one estimate for the number protons in Betelgeuse is 2.16 × 10^58. The mass of one proton is about 1.67 × 10^-27 kg. What is the total mass of all the protons in Betelgeuse?

Approximate by the product of (2 × 10^58) ×
(2 × 10^-27).

(2 × 10^58) × (2 × 10^-27)

__ × 10^_ kilograms

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