290
To find the final product of 29 multiplied by 16, Garth first multiplied the ones digits (9 and 6) to get 54, which gives him 174 after considering the carry-over. Next, he multiplied the tens digits (2 and 1) to get 2, which he then added to the product of the ones digits to get 176. Finally, he added a zero to the product of the tens digits to get 290 and added this to the previous sum to arrive at the final product of 464.