9.042 divide by 2.1 show me how to solve this

The answer is 4.306 because you shift both the decimals 1 place to the right so 21x4 is is 84,90-84 is 6 bring down the four, 21x3 is 63 and it just keeps going so you round it to 4.306

1.First ,right the numbers as common fractions, improper to be exact:
9.042=4521/500  2.1=21/10
2. Rewrite the equation
(4521/500)/(21/10)=(
3.Since you are dividing , you can change the symbol to times if you replace the divisor by its reciprocal 4521/500)*(10/21)
4. Multiply ,divide and simply
5.the final answer could be 1507/350 or4.30571428

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