If a box contains 400 couplings and you have 4 full boxes in stock, how many couplings do you have before considering the 1/4 full box?

To determine the total number of couplings you have before considering the 1/4 full box, you can simply multiply the number of couplings in each full box by the total number of full boxes.

Since each box contains 400 couplings and there are 4 full boxes, the calculation is as follows:

400 couplings/box × 4 boxes = 1,600 couplings.

This approach accurately reflects the quantity of complete boxes without including any partial contents. Therefore, the total number of couplings before considering the 1/4 full box is 1,600.