how to round the value with math.round

I am trying to round the value from 8904000 to 8900000 is there any possible way to change this using Math.round. example in MS Excel =round(8904000,-5); ANS: 8900000 I TRIED LIKE THIS BUT NOT WORK Math.round(8904000,-5); ANS: 8904000 i need it in Math.round(?)

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