# multiply ... hundred times

This means "produce 100 more people for every one person there is now." (See: [[rc://en/ta/man/translate/translate-numbers]])

# the king's word was final against Joab

Joab and the other commanders of King David's army were not able to convince David to not take a census.

# the king's word

This phrase represents the king's command to them. AT: "what the king had commanded" (See: [[rc://en/ta/man/translate/figs-synecdoche]])