Hey there!
If she swims 850 meters ever day for 9 days, multiply 850 x 9 to find how many meters she swam in those 9 days.
850 x 9 = 7,650 meters
However, we must write our answer in kilometers.
There are 1,000 meters in a kilometer. To convert meters to kilometers, divide by 1,000.
7,650 ÷ 1,000 = 7.65 kilometers
She swam 7.65 kilometers in 9 days.
Hope this helps!