inp=raw_input().split()
N=int(inp[0]) #row
M=int(inp[1]) #column
screen=[]
for i in xrange(0,N):
    screen.append(raw_input())

x1=0
y1=0
x2=0
y2=0

T=int(raw_input())

for i in xrange(0,T):
    inp=raw_input().split()
    x1=int(inp[0])
    y1=int(inp[1])
    x2=int(inp[2])
    y2=int(inp[3])

    height=x2-x1+1;
    Y1=y1-1
    Y2=0
    maxx=0
    for j in range(y1-1,y2):
        flag=False
        for k in range(x1-1,x2):
            if(screen[k][j]=='1'):
                flag=True
                break

        if(flag):
            Y2=j
        else:
            newwidth=Y2-Y1+1
            if(newwidth>maxx):
                maxx=newwidth
            Y1=j
            Y2=j

    area=maxx*height
    print (area)