When you want to convert from a larger unit to a smaller unit, you need to know how much is the smaller unit actually smaller than the larger unit. From there, you simply multiply wanted larger unit with that.
For example, 1km = 1000m, so for example 34km = 34 * 1000 = 34000m.
In this case, 1m is thousand times smaller than 1km. I hope this helps!
