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Multiply with partial products (2-digit numbers)

Problem

Greg tried to evaluate 86, times, 37 using partial products, but he made a mistake. His work is below.
86×37Step 12,40030×80Step 2183×6Step 35607×80Step 4+427×6Step 53,020\begin{array}{llrr} &&86 \\ &&\underline{{}\times37} \\ &\goldE{\text{Step 1}}&\goldE{ 2{,}400}& \goldE{30\times 80}\\ &\maroonE{\text{Step 2}}&\maroonE{18}& \maroonE{3\times 6}\\ &\tealE{\text{Step 3}}&\tealE{560}& \tealE{7\times 80}\\ &\blueE{\text{Step 4}}&\underline{{}+\blueE{42}}& \blueE{7\times6}\\ &\purpleE{\text{Step 5}}&\purpleE{3{,}020}& \end{array}
Find Greg's mistake.
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