I am trying to convert lw $t3, 12($t0) to binary but I am stuck.

I am not very familiar with base register addressing. I know that lw is opcode 100011 and that $t3 is rt, and that the 12 represents the 16 bit number. The structure is also:

Opcode = 6 bits, rs = 5 bits, rt = 5 bits, immediate = 16 bits

If anyone can help be transform this into binary it would be of great help!