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1⋅4+4⋅7+7⋅10+10⋅13+⋯+97⋅1001 \cdot 4 + 4 \cdot 7 + 7 \cdot10 + 10 \cdot13 + \cdots + 97\cdot100 1⋅4+4⋅7+7⋅10+10⋅13+⋯+97⋅100
Find the sum of digits of the value of the sum above.
For example, if the sum is 12, then submit your answer as 1+2=31+2=31+2=3.
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