AZ

@David I agree. Solving this on mobile was pretty rough. I appreciate the concept and execution, but the multiplication symbols weren't obvious and the title isn't visible while solving. Not that it meant anything to me anyway! I initially thought they were going to be clocks, based on the revealer answer! On a grid this dense, it's always hard to track down where stray errors could be. The opaque (to me) mechanism made that part of the solve much, much longer than usual.