Quick answer
Pricing depends on your specific risk profile more than a flat formula: the number of properties and vehicles you own, whether you have a pool or watercraft, whether you employ domestic staff, any board or executive positions, and your claims history all factor in. Two households at the same coverage amount can pay meaningfully different premiums depending on which of these apply.
This is why a real quote requires a real review of your specific exposures, not a generic number based on coverage amount alone.