Convert from square chain [Gunter, survey] to square inch

Unit Definition (square chain [Gunter, survey])
The square chain [Gunter, survey] is a traditional unit of area in English surveying, defined to be the area of a square whose side equals Gunter's chain (4 rods or 22 yards). Thus the square chain equals 16 square rods, 484 square yards, 4356 square feet, or exactly 0.1 acre.

Unit Definition (square inch)
The square inch is a traditional unit of area. 1 in² equals exactly 6.4516 cm² or 645.16 mm².