Hadley tried to evaluate 5\times4{,}0005×4,0005, times, 4, comma, 000 step by step. \phantom{=}\greenD5\times\blueD{4{, }000}=5×4,000empty space, start color greenD, 5, end color greenD, times, start color blueD, 4, comma, 000, end color blueD {\text{Step } 1}Step 1S, t, e, p, space, 1 =\greenD5 \times \blueD{4} \times \blueD{1{,}000} =5×4×1,000equals, start color greenD, 5, end color greenD, times, start color blueD, 4, end color blueD, times, start color blueD, 1, comma, 000, end color blueD {\text{Step } 2}Step 2S, t, e, p, space, 2 = 20\times \blueD{1{,}000} =20×1,000equals, 20, times, start color blueD, 1, comma, 000, end color blueD {\text{Step } 3}Step 3S, t, e, p, space, 3 =20{,}000=20,000equals, 20, comma, 000 Find Hadley's mistake.