You have 8\*10^10 in the numerator and 5\*10^5 in the denominator, so the result...

		maxerickson 3 days ago \| parent \| context \| favorite \| on: Can “second life” EV batteries work as grid-scale ... You have 810^10 in the numerator and 510^5 in the denominator, so the result should be roughly 8/5*10^5. Still big number.